Improvement in tilting chairs



ZShee-tsSheet 2.

J. LEM MAN. TIMING-0mm.

Patented Ian. 11,- 1876.

No.17 Z.040.

IIIIIII.

NFEIERS. PHOTO'UTHDGRAPHER. WASHINGTON, D C,

UNITED STATES PATENT OFFICE.

JOHN LEMMAN, OF CINCINNATI, OHIO.

IMPROVEMENT IN TILTING CHAIRS.

Specification forming part of Letters Patent No. 172,040, dated January 11, 1876; application filed October 28, 1875 To all whom it may concern:

Be it known that 1, JOHN LEMMAN, of Gincinnati, Hamilton county, State of Ohio. have invented Improvements in Reclining-Chairs, of which the following is a specification:

My invention is designed as an improvement upon the chair for which Letters Patent were granted me May 25, 1875; and consists in a new and improved method of securing the seat to the spring-frame, so as to admit of adj ustability and fastening when adjusted by the use of a single screw only.

In the accompanying drawings, Figure 1 is a perspective view of the stand andspringframe. Fig. 2 is a sectional view 01 the center of the stationary stand, showing the construction and manner of attaching the devices which control and steady the central screw.

Fig. 3 is an under side perspective view of theseat-frame. Fig. 4 is a sectional view of the springframe, seat-frame, and seat.

A is the stationary stand; B, the adjustingscrew; and O the spring-frame, the latter consisting of side springs c c, spider c, and top plate O. In order to firmly secure and guide the screw B, without exposing its screwthreads above the base A, I provide two plates, 1) D, the upper one having a cylindrical socket, d, to receive and guide the smooth part of the screw, as shown in Fig. 2, and the lower one having a socket,d, which is screw-threaded interiorly, as shown, to lit the threads of the screw. The plate D has projecting bosses at, fitting closely into bored recesses in the base A, to assist in holding the separate parts of the base together. The top plate 0 of the spring-frame is formed with a central slot, 6, and three projections, f. A plate, E, is provided, secured to the chair-hottoln frame F, as shown in Fig. 4, from which plateacentral screw, G, projects, which passes through the slot 6, and is fitted with-a thumbnut, H. This plate E is provided also with long recesses g, which fit and slide over the projectionsf of the plate 0. By the provision of'the slot 6 and screw G the chairbottom may be adjusted with reference to the springs to suit the weights of dififerent persons, and secured at any point of adjustment by the nut H, the projections and recesses f 9 serving to properly guide the chair-bottom during the process of adjustment. The leverage of the seat-frame on the springs being increased or diminished by this adjustment 

